11101021221012 has 24 divisors (see below), whose sum is σ = 25902509318112. Its totient is φ = 3700322340000.

The previous prime is 11101021221011. The next prime is 11101021221019. The reversal of 11101021221012 is 21012212010111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11101021220982 and 11101021221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101021221011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429762 + ... + 4731462.

It is an arithmetic number, because the mean of its divisors is an integer number (1079271221588).

Almost surely, 2^{11101021221012} is an apocalyptic number.

11101021221012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11101021221012 is an abundant number, since it is smaller than the sum of its proper divisors (14801488097100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11101021221012 is a wasteful number, since it uses less digits than its factorization.

11101021221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4516759 (or 4516757 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11101021221012 its reverse (21012212010111), we get a palindrome (32113233231123).

The spelling of 11101021221012 in words is "eleven trillion, one hundred one billion, twenty-one million, two hundred twenty-one thousand, twelve".